Any Alternatives to Google adwords and bing ads only for the search network?

Hi Guys.
I was using google adwords and bing ads but now suddenly they stopped promoting the ads for third party products/services.
I wanted to know Is there any other alternatives to google adwords and bing ads?
I just wanted to know about the search network platform on which the ads appeared when someone searches for a particular keyword and the ads appears on the search engine.

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